From 8fc1b0f87d9fcc7f05873c70b3003328c3d7defa Mon Sep 17 00:00:00 2001 From: Kumar Gala Date: Tue, 21 Jan 2014 17:14:10 -0600 Subject: ARM: qcom: Split Qualcomm support into legacy and multiplatform Introduce a new mach-qcom that will support SoCs that intend to be multiplatform compatible while keeping mach-msm to legacy SoC/board support that will not transition over to multiplatform. As part of this, we move support for MSM8X60, MSM8960 and MSM8974 over to mach-qcom. Signed-off-by: Kumar Gala --- arch/arm/mach-qcom/Kconfig | 33 +++++ arch/arm/mach-qcom/Makefile | 5 + arch/arm/mach-qcom/board.c | 40 ++++++ arch/arm/mach-qcom/platsmp.c | 137 +++++++++++++++++++ arch/arm/mach-qcom/scm-boot.c | 39 ++++++ arch/arm/mach-qcom/scm-boot.h | 22 ++++ arch/arm/mach-qcom/scm.c | 299 ++++++++++++++++++++++++++++++++++++++++++ arch/arm/mach-qcom/scm.h | 25 ++++ 8 files changed, 600 insertions(+) create mode 100644 arch/arm/mach-qcom/Kconfig create mode 100644 arch/arm/mach-qcom/Makefile create mode 100644 arch/arm/mach-qcom/board.c create mode 100644 arch/arm/mach-qcom/platsmp.c create mode 100644 arch/arm/mach-qcom/scm-boot.c create mode 100644 arch/arm/mach-qcom/scm-boot.h create mode 100644 arch/arm/mach-qcom/scm.c create mode 100644 arch/arm/mach-qcom/scm.h (limited to 'arch/arm/mach-qcom') diff --git a/arch/arm/mach-qcom/Kconfig b/arch/arm/mach-qcom/Kconfig new file mode 100644 index 000000000000..a028be234334 --- /dev/null +++ b/arch/arm/mach-qcom/Kconfig @@ -0,0 +1,33 @@ +config ARCH_QCOM + bool "Qualcomm Support" if ARCH_MULTI_V7 + select ARCH_REQUIRE_GPIOLIB + select ARM_GIC + select CLKSRC_OF + select GENERIC_CLOCKEVENTS + select HAVE_SMP + select QCOM_SCM if SMP + help + Support for Qualcomm's devicetree based systems. + +if ARCH_QCOM + +menu "Qualcomm SoC Selection" + +config ARCH_MSM8X60 + bool "Enable support for MSM8X60" + select CLKSRC_QCOM + +config ARCH_MSM8960 + bool "Enable support for MSM8960" + select CLKSRC_QCOM + +config ARCH_MSM8974 + bool "Enable support for MSM8974" + select HAVE_ARM_ARCH_TIMER + +endmenu + +config QCOM_SCM + bool + +endif diff --git a/arch/arm/mach-qcom/Makefile b/arch/arm/mach-qcom/Makefile new file mode 100644 index 000000000000..8f756ae1ae31 --- /dev/null +++ b/arch/arm/mach-qcom/Makefile @@ -0,0 +1,5 @@ +obj-y := board.o +obj-$(CONFIG_SMP) += platsmp.o +obj-$(CONFIG_QCOM_SCM) += scm.o scm-boot.o + +CFLAGS_scm.o :=$(call as-instr,.arch_extension sec,-DREQUIRES_SEC=1) diff --git a/arch/arm/mach-qcom/board.c b/arch/arm/mach-qcom/board.c new file mode 100644 index 000000000000..4529f6b222d3 --- /dev/null +++ b/arch/arm/mach-qcom/board.c @@ -0,0 +1,40 @@ +/* Copyright (c) 2010-2014 The Linux Foundation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include +#include +#include + +#include +#include + +extern struct smp_operations msm_smp_ops; + +static const char * const qcom_dt_match[] __initconst = { + "qcom,msm8660-surf", + "qcom,msm8960-cdp", + NULL +}; + +static const char * const apq8074_dt_match[] __initconst = { + "qcom,apq8074-dragonboard", + NULL +}; + +DT_MACHINE_START(QCOM_DT, "Qualcomm (Flattened Device Tree)") + .smp = smp_ops(msm_smp_ops), + .dt_compat = qcom_dt_match, +MACHINE_END + +DT_MACHINE_START(APQ_DT, "Qualcomm (Flattened Device Tree)") + .dt_compat = apq8074_dt_match, +MACHINE_END diff --git a/arch/arm/mach-qcom/platsmp.c b/arch/arm/mach-qcom/platsmp.c new file mode 100644 index 000000000000..67823a7bec0d --- /dev/null +++ b/arch/arm/mach-qcom/platsmp.c @@ -0,0 +1,137 @@ +/* + * Copyright (C) 2002 ARM Ltd. + * All Rights Reserved + * Copyright (c) 2010, Code Aurora Forum. All rights reserved. + * Copyright (c) 2014 The Linux Foundation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include +#include +#include +#include +#include +#include + +#include +#include + +#include "scm-boot.h" + +#define VDD_SC1_ARRAY_CLAMP_GFS_CTL 0x15A0 +#define SCSS_CPU1CORE_RESET 0xD80 +#define SCSS_DBG_STATUS_CORE_PWRDUP 0xE64 + +extern void secondary_startup(void); + +static DEFINE_SPINLOCK(boot_lock); + +#ifdef CONFIG_HOTPLUG_CPU +static void __ref msm_cpu_die(unsigned int cpu) +{ + wfi(); +} +#endif + +static inline int get_core_count(void) +{ + /* 1 + the PART[1:0] field of MIDR */ + return ((read_cpuid_id() >> 4) & 3) + 1; +} + +static void msm_secondary_init(unsigned int cpu) +{ + /* + * Synchronise with the boot thread. + */ + spin_lock(&boot_lock); + spin_unlock(&boot_lock); +} + +static void prepare_cold_cpu(unsigned int cpu) +{ + int ret; + ret = scm_set_boot_addr(virt_to_phys(secondary_startup), + SCM_FLAG_COLDBOOT_CPU1); + if (ret == 0) { + void __iomem *sc1_base_ptr; + sc1_base_ptr = ioremap_nocache(0x00902000, SZ_4K*2); + if (sc1_base_ptr) { + writel(0, sc1_base_ptr + VDD_SC1_ARRAY_CLAMP_GFS_CTL); + writel(0, sc1_base_ptr + SCSS_CPU1CORE_RESET); + writel(3, sc1_base_ptr + SCSS_DBG_STATUS_CORE_PWRDUP); + iounmap(sc1_base_ptr); + } + } else + printk(KERN_DEBUG "Failed to set secondary core boot " + "address\n"); +} + +static int msm_boot_secondary(unsigned int cpu, struct task_struct *idle) +{ + static int cold_boot_done; + + /* Only need to bring cpu out of reset this way once */ + if (cold_boot_done == false) { + prepare_cold_cpu(cpu); + cold_boot_done = true; + } + + /* + * set synchronisation state between this boot processor + * and the secondary one + */ + spin_lock(&boot_lock); + + /* + * Send the secondary CPU a soft interrupt, thereby causing + * the boot monitor to read the system wide flags register, + * and branch to the address found there. + */ + arch_send_wakeup_ipi_mask(cpumask_of(cpu)); + + /* + * now the secondary core is starting up let it run its + * calibrations, then wait for it to finish + */ + spin_unlock(&boot_lock); + + return 0; +} + +/* + * Initialise the CPU possible map early - this describes the CPUs + * which may be present or become present in the system. The msm8x60 + * does not support the ARM SCU, so just set the possible cpu mask to + * NR_CPUS. + */ +static void __init msm_smp_init_cpus(void) +{ + unsigned int i, ncores = get_core_count(); + + if (ncores > nr_cpu_ids) { + pr_warn("SMP: %u cores greater than maximum (%u), clipping\n", + ncores, nr_cpu_ids); + ncores = nr_cpu_ids; + } + + for (i = 0; i < ncores; i++) + set_cpu_possible(i, true); +} + +static void __init msm_smp_prepare_cpus(unsigned int max_cpus) +{ +} + +struct smp_operations msm_smp_ops __initdata = { + .smp_init_cpus = msm_smp_init_cpus, + .smp_prepare_cpus = msm_smp_prepare_cpus, + .smp_secondary_init = msm_secondary_init, + .smp_boot_secondary = msm_boot_secondary, +#ifdef CONFIG_HOTPLUG_CPU + .cpu_die = msm_cpu_die, +#endif +}; diff --git a/arch/arm/mach-qcom/scm-boot.c b/arch/arm/mach-qcom/scm-boot.c new file mode 100644 index 000000000000..45cee3e469a5 --- /dev/null +++ b/arch/arm/mach-qcom/scm-boot.c @@ -0,0 +1,39 @@ +/* Copyright (c) 2010, Code Aurora Forum. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA. + */ + +#include +#include + +#include "scm.h" +#include "scm-boot.h" + +/* + * Set the cold/warm boot address for one of the CPU cores. + */ +int scm_set_boot_addr(phys_addr_t addr, int flags) +{ + struct { + unsigned int flags; + phys_addr_t addr; + } cmd; + + cmd.addr = addr; + cmd.flags = flags; + return scm_call(SCM_SVC_BOOT, SCM_BOOT_ADDR, + &cmd, sizeof(cmd), NULL, 0); +} +EXPORT_SYMBOL(scm_set_boot_addr); diff --git a/arch/arm/mach-qcom/scm-boot.h b/arch/arm/mach-qcom/scm-boot.h new file mode 100644 index 000000000000..7be32ff5d687 --- /dev/null +++ b/arch/arm/mach-qcom/scm-boot.h @@ -0,0 +1,22 @@ +/* Copyright (c) 2010, Code Aurora Forum. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ +#ifndef __MACH_SCM_BOOT_H +#define __MACH_SCM_BOOT_H + +#define SCM_BOOT_ADDR 0x1 +#define SCM_FLAG_COLDBOOT_CPU1 0x1 +#define SCM_FLAG_WARMBOOT_CPU1 0x2 +#define SCM_FLAG_WARMBOOT_CPU0 0x4 + +int scm_set_boot_addr(phys_addr_t addr, int flags); + +#endif diff --git a/arch/arm/mach-qcom/scm.c b/arch/arm/mach-qcom/scm.c new file mode 100644 index 000000000000..c536fd6bf827 --- /dev/null +++ b/arch/arm/mach-qcom/scm.c @@ -0,0 +1,299 @@ +/* Copyright (c) 2010, Code Aurora Forum. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA. + */ + +#include +#include +#include +#include +#include +#include + +#include + +#include "scm.h" + +/* Cache line size for msm8x60 */ +#define CACHELINESIZE 32 + +#define SCM_ENOMEM -5 +#define SCM_EOPNOTSUPP -4 +#define SCM_EINVAL_ADDR -3 +#define SCM_EINVAL_ARG -2 +#define SCM_ERROR -1 +#define SCM_INTERRUPTED 1 + +static DEFINE_MUTEX(scm_lock); + +/** + * struct scm_command - one SCM command buffer + * @len: total available memory for command and response + * @buf_offset: start of command buffer + * @resp_hdr_offset: start of response buffer + * @id: command to be executed + * @buf: buffer returned from scm_get_command_buffer() + * + * An SCM command is laid out in memory as follows: + * + * ------------------- <--- struct scm_command + * | command header | + * ------------------- <--- scm_get_command_buffer() + * | command buffer | + * ------------------- <--- struct scm_response and + * | response header | scm_command_to_response() + * ------------------- <--- scm_get_response_buffer() + * | response buffer | + * ------------------- + * + * There can be arbitrary padding between the headers and buffers so + * you should always use the appropriate scm_get_*_buffer() routines + * to access the buffers in a safe manner. + */ +struct scm_command { + u32 len; + u32 buf_offset; + u32 resp_hdr_offset; + u32 id; + u32 buf[0]; +}; + +/** + * struct scm_response - one SCM response buffer + * @len: total available memory for response + * @buf_offset: start of response data relative to start of scm_response + * @is_complete: indicates if the command has finished processing + */ +struct scm_response { + u32 len; + u32 buf_offset; + u32 is_complete; +}; + +/** + * alloc_scm_command() - Allocate an SCM command + * @cmd_size: size of the command buffer + * @resp_size: size of the response buffer + * + * Allocate an SCM command, including enough room for the command + * and response headers as well as the command and response buffers. + * + * Returns a valid &scm_command on success or %NULL if the allocation fails. + */ +static struct scm_command *alloc_scm_command(size_t cmd_size, size_t resp_size) +{ + struct scm_command *cmd; + size_t len = sizeof(*cmd) + sizeof(struct scm_response) + cmd_size + + resp_size; + + cmd = kzalloc(PAGE_ALIGN(len), GFP_KERNEL); + if (cmd) { + cmd->len = len; + cmd->buf_offset = offsetof(struct scm_command, buf); + cmd->resp_hdr_offset = cmd->buf_offset + cmd_size; + } + return cmd; +} + +/** + * free_scm_command() - Free an SCM command + * @cmd: command to free + * + * Free an SCM command. + */ +static inline void free_scm_command(struct scm_command *cmd) +{ + kfree(cmd); +} + +/** + * scm_command_to_response() - Get a pointer to a scm_response + * @cmd: command + * + * Returns a pointer to a response for a command. + */ +static inline struct scm_response *scm_command_to_response( + const struct scm_command *cmd) +{ + return (void *)cmd + cmd->resp_hdr_offset; +} + +/** + * scm_get_command_buffer() - Get a pointer to a command buffer + * @cmd: command + * + * Returns a pointer to the command buffer of a command. + */ +static inline void *scm_get_command_buffer(const struct scm_command *cmd) +{ + return (void *)cmd->buf; +} + +/** + * scm_get_response_buffer() - Get a pointer to a response buffer + * @rsp: response + * + * Returns a pointer to a response buffer of a response. + */ +static inline void *scm_get_response_buffer(const struct scm_response *rsp) +{ + return (void *)rsp + rsp->buf_offset; +} + +static int scm_remap_error(int err) +{ + switch (err) { + case SCM_ERROR: + return -EIO; + case SCM_EINVAL_ADDR: + case SCM_EINVAL_ARG: + return -EINVAL; + case SCM_EOPNOTSUPP: + return -EOPNOTSUPP; + case SCM_ENOMEM: + return -ENOMEM; + } + return -EINVAL; +} + +static u32 smc(u32 cmd_addr) +{ + int context_id; + register u32 r0 asm("r0") = 1; + register u32 r1 asm("r1") = (u32)&context_id; + register u32 r2 asm("r2") = cmd_addr; + do { + asm volatile( + __asmeq("%0", "r0") + __asmeq("%1", "r0") + __asmeq("%2", "r1") + __asmeq("%3", "r2") +#ifdef REQUIRES_SEC + ".arch_extension sec\n" +#endif + "smc #0 @ switch to secure world\n" + : "=r" (r0) + : "r" (r0), "r" (r1), "r" (r2) + : "r3"); + } while (r0 == SCM_INTERRUPTED); + + return r0; +} + +static int __scm_call(const struct scm_command *cmd) +{ + int ret; + u32 cmd_addr = virt_to_phys(cmd); + + /* + * Flush the entire cache here so callers don't have to remember + * to flush the cache when passing physical addresses to the secure + * side in the buffer. + */ + flush_cache_all(); + ret = smc(cmd_addr); + if (ret < 0) + ret = scm_remap_error(ret); + + return ret; +} + +/** + * scm_call() - Send an SCM command + * @svc_id: service identifier + * @cmd_id: command identifier + * @cmd_buf: command buffer + * @cmd_len: length of the command buffer + * @resp_buf: response buffer + * @resp_len: length of the response buffer + * + * Sends a command to the SCM and waits for the command to finish processing. + */ +int scm_call(u32 svc_id, u32 cmd_id, const void *cmd_buf, size_t cmd_len, + void *resp_buf, size_t resp_len) +{ + int ret; + struct scm_command *cmd; + struct scm_response *rsp; + + cmd = alloc_scm_command(cmd_len, resp_len); + if (!cmd) + return -ENOMEM; + + cmd->id = (svc_id << 10) | cmd_id; + if (cmd_buf) + memcpy(scm_get_command_buffer(cmd), cmd_buf, cmd_len); + + mutex_lock(&scm_lock); + ret = __scm_call(cmd); + mutex_unlock(&scm_lock); + if (ret) + goto out; + + rsp = scm_command_to_response(cmd); + do { + u32 start = (u32)rsp; + u32 end = (u32)scm_get_response_buffer(rsp) + resp_len; + start &= ~(CACHELINESIZE - 1); + while (start < end) { + asm ("mcr p15, 0, %0, c7, c6, 1" : : "r" (start) + : "memory"); + start += CACHELINESIZE; + } + } while (!rsp->is_complete); + + if (resp_buf) + memcpy(resp_buf, scm_get_response_buffer(rsp), resp_len); +out: + free_scm_command(cmd); + return ret; +} +EXPORT_SYMBOL(scm_call); + +u32 scm_get_version(void) +{ + int context_id; + static u32 version = -1; + register u32 r0 asm("r0"); + register u32 r1 asm("r1"); + + if (version != -1) + return version; + + mutex_lock(&scm_lock); + + r0 = 0x1 << 8; + r1 = (u32)&context_id; + do { + asm volatile( + __asmeq("%0", "r0") + __asmeq("%1", "r1") + __asmeq("%2", "r0") + __asmeq("%3", "r1") +#ifdef REQUIRES_SEC + ".arch_extension sec\n" +#endif + "smc #0 @ switch to secure world\n" + : "=r" (r0), "=r" (r1) + : "r" (r0), "r" (r1) + : "r2", "r3"); + } while (r0 == SCM_INTERRUPTED); + + version = r1; + mutex_unlock(&scm_lock); + + return version; +} +EXPORT_SYMBOL(scm_get_version); diff --git a/arch/arm/mach-qcom/scm.h b/arch/arm/mach-qcom/scm.h new file mode 100644 index 000000000000..00b31ea58f29 --- /dev/null +++ b/arch/arm/mach-qcom/scm.h @@ -0,0 +1,25 @@ +/* Copyright (c) 2010, Code Aurora Forum. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ +#ifndef __MACH_SCM_H +#define __MACH_SCM_H + +#define SCM_SVC_BOOT 0x1 +#define SCM_SVC_PIL 0x2 + +extern int scm_call(u32 svc_id, u32 cmd_id, const void *cmd_buf, size_t cmd_len, + void *resp_buf, size_t resp_len); + +#define SCM_VERSION(major, minor) (((major) << 16) | ((minor) & 0xFF)) + +extern u32 scm_get_version(void); + +#endif -- cgit